Improvement in mill-burr furrow-gages



HL WILHELM aps. F. LEYDE. MILL BURR FURROWVGAUGE. v No.170,143..Patented Nov. 16, `1875.

UNITED STAT-Es PATENT OFFICE.

HENRY WILHELM AND sALATHIEL E. LE'YDE, OE MINERVA, OHIO; sAID LEYDEAssIGNon OE ONE-HALE His -RIGHT To JOHN E. LEYDE.

IMPROVEMENT IN MILL-BURR FURROW'GAGES.

Specication forming part of Letters Patent No. 170,14 3, dated November16, 1875; application led September 21, 1875.

To all whom it may concern.-

Be it known that we, HENRY WILHELM and SALATHIEL F. LEYDE, of Minerva,in the county of Stark and State of Ohio, have invented certain new anduseful Improvements in Mill-Burr Furrow-Gages; and we do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it appertainstomake and use the same, reference being had tothe accompanying drawingsand to the letters of reference marked thereon, which form a part ofthis specification, and in which- Figure l is a perspective view. Fig. 2is a vertical section of a burr-millstone, showing the application ofour gage or guide; and Fig. 3 is a front view.

Similar letters of .reference indicate correspending parts' in all thefigures.

This invention consists in the construction and arrangement of a gage orguide for ascertaining the depth, pitch, and angle of the furrows in aburr-millstone; and its object is to enable those engaged in furrowingmillstones to produce furrows of exactly the same depth, pitch, andangle, this being o f the utmost importance, in order that the burr mayrun true and do perfect work.

In the drawing, A represents a level, made of wood or other suitablematerial, the under side of which must be perfectly true and even. A' isa metal plate, having a dovetailed slot, a, and a scale, b, engraved onone side of the slot. B is a metallic plate, that slides in the slot a,and may be retained in any given position by set-screw, c, insertedthrough the back of level A. At the top of plate B is a scale, d, andtothe lower part of this plate is pivoted another plate, G, the top ofwhich forms a point or indicator, e. The plate C may be retained in anysuitable position in its relation to plate B by means of a setscrew, f.To the bottom of plate C are afixed, at right angles, the segments D,which `form jawsV or bearings for the graduated segment E, pivoted atthe center ot the arc at g. The graduated segment E may be secured inany given position in its relation to the bearings D by a set-screw, h.To one side of the segment E is axed, at right angles, a metallic plate,F, that slides in a dovetailed plate,

G, that is affixed upon, or sunk into, the sliding staff H. t' 'i areiingerknobs, by which the staff H may be moved upon the plate F. It maybe retained in any given position upon this plate by means of set-screwsk'k.

The manner of using this device is as follows: The level A is placedupon the smooth part of the millstone alongside of the furrow alreadycut. The. set-screws c f h k are then loosened, and the staE H isallowed to drop into the furrow untilits lower edge touches the bedthereof. All the set-screws are then again tightened, when the positionof the staff Hwill indicate the exact depth, pitch, and angle of thefurrow. In cutting the next furrow it is gaged during the process ofcutting by placing the level A upon the top of the stone, next to thefurrow, loosening the setscrews lo 7c, and sliding the staff H up ordown through the furrow as it is being cut. In other words, the verticalmotion of the plate B will denote upon the depth-scale b the exact depthof the furrow, and as every furrow is deeper at the eye or bosom of theburr than at the circumference, the point e of the oscillating plate Cwill denote the pitch of the furrow upon the pitch-scale d. The segmentE will, by its gradations, indicate the exact angles of the walls orsides of the furrow, while 'the operation of staffing or gaging thefurrow may be done without moving 'the level A simply by sliding thestaff H along the sliding plate F.

Having thus described our invention, weA

claim 'and desire to secure by Letters Patent of the United States- Thedevice for gaging the furrows in bu-rrmillstones herein described,consisting ofthe level A, sliding plates B and F, oscillating plate C,having the jaws D D and graduated segment E pivoted thereto, staff H,and setsorews c f h k, all combined and arranged substantially as andfor the purpose hereinbefore set forth.

In testimony that we claim the foregoing as our own we have heretoaffixed our signatures in presence of two witnesses.

HENRY WILHELM. SALATHIEL F. LEYDE. Witnesses:

O. LAUTzENHEIsER, J AMES J ERoME.

